Overnight on May 12 into the early hours of May 13, 2026, nine quakes hit just east of Tehran. Fear spread
across the capital as shaking continued through darkness. Closest to Pardis, one jolt reached magnitude 4.6. That strongest shock came at exactly 11:46 p.m. local time. Residents felt it clearly, though damage reports stayed limited. Not every tremor registered far beyond its origin point. Still, nerves remained
frayed by morning.
Felt sharply through northern parts of Tehran, then spreading southeast – this string of tremors reached Karaj and Varamin too. Though buildings stayed intact, nobody got hurt either.
Geological Context
Far from the city center, shaking began about thirty five kilometers east of Tehran. Close to where Tehran province meets Mazandaran, the ground cracked beneath. Nearby villages felt it first. Not far from busy roads, the pulse traveled through rock layers. This spot lies along a restless edge between two regions.
Earthquakes here might stem from shifts along both the Mosha Fault and also the North Tehran Fault – key sources of tremors in this area. These two fault lines stand out due to how often they move plus their potential for strong quakes. Scientists watching ground movements tie recent shaking directly to these connected structures deep underground.
A shake like this happened before – back in April 2026, one hit at magnitude 4.1 nearby. That earlier jolt might mean the ground has been under more strain lately.
The Response
Still shaking. The ground won’t settle, so rescue crews across Tehran Province stay wide awake. Aftershocks keep coming, one after another. Workers from the Iranian Red Crescent haven’t stood down. Every team watches, waits, moves only when needed. Tremors change plans fast. Safety depends on speed now. Nobody clocks out.
Out in the open, thousands from Pardis and eastern Tehran stayed overnight – some even huddled inside cars – as worry grew over a stronger quake possibly coming. People chose pavements instead of homes when the ground shook, afraid to go back indoors after the first tremor passed
Still uncertain whether these shakes safely let go of pressure, seismologist Mehdi Zare says – or they’re quietly setting up something stronger ahead. What looks calm now might just be pause before another move.
